Airworthiness Directive · Amendment 39-17833 · Aircraft fuel system
The Boeing Company Airplanes
This AD applies to The Boeing Company Model 767-200, -300, -300F, and -400ER series airplanes, certificated in any category, that have received an original airworthiness certificate or original export certificate of airworthiness issued before November 2, 2012.
Note 1 to paragraph (c) of this AD: November 2, 2012, is the original publication date of Revision October 2012 of Section 9, Airworthiness Limitations (AWLs) and Certification Maintenance Requirements (CMRs), D622T001-9, including AWL No. 28-AWL-101, Engine Fuel Suction Feed Operational Test, of the Boeing 767 Maintenance Planning Data (MPD) Document.
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 767 airplanes. This AD was prompted by reports of two in-service occurrences on Model 737-400 airplanes of total loss of boost pump pressure of the fuel feed system, followed by loss of fuel system suction feed capability on one engine, and in-flight shutdown of the engine. This AD requires revising the maintenance program to incorporate a revision to the Airworthiness Limitations section of the maintenance planning data document. We are issuing this AD to detect and correct failure of the engine fuel suction feed capability of the fuel system, which could result in dual engine flameout, inability to restart the engines, and consequent forced landing of the airplane.
Within 90 days after the effective date of this AD: Revise the maintenance program to incorporate AWL No. 28-AWL-101, Engine Fuel Suction Feed Operational Test, of Section D., Airworthiness Limitations—Systems, of Section 9, Airworthiness Limitations (AWLs) and Certification Maintenance Requirements (CMRs), D622T001-9, Revision October 2012, January 2013, April 2013, August 2013, September 2013, or November 2013 of the Boeing 767 MPD Document. The initial compliance time for the test is within 7,500 flight hours or 3 years, whichever occurs first after incorporation of the AWL into the maintenance program.
After accomplishing the revision required by paragraph (g) of this AD, no alternative actions (e.g., tests) or intervals may be used unless the actions or intervals are approved as an alternative method of compliance (AMOC) in accordance with the procedures specified in paragraph (i) of this AD.
